Avoid using slots with `dataclasses in Python earlier than 3.11

Author: althonos

pronto/entity/__init__.py

@@ -3,13 +3,13 @@
 import operator
 import typing
 import weakref
-from dataclasses import dataclass, field
+from dataclasses import field
 from typing import AbstractSet, Any, Dict, FrozenSet, Iterable, Iterator, Optional, Set
 
 from ..definition import Definition
 from ..pv import PropertyValue
 from ..synonym import Synonym, SynonymData, SynonymType
-from ..utils.meta import roundrepr, typechecked
+from ..utils.meta import dataclass, roundrepr, typechecked
 from ..xref import Xref
 
 if typing.TYPE_CHECKING:
@@ -51,8 +51,6 @@ class EntityData:
     if typing.TYPE_CHECKING:
         __annotations__: Dict[str, str]
 
-    #__slots__ = ("__weakref__",) + tuple(__annotations__)  # noqa: E0602
-
 
 class Entity(typing.Generic[_D, _S]):
     """An entity in the ontology graph.

pronto/relationship.py

@@ -1,7 +1,7 @@
 import datetime
 import operator
 import typing
-from dataclasses import dataclass, field
+from dataclasses import field
 from typing import Dict, Iterable, FrozenSet, Optional, Set, Tuple, Iterator
 
 from .definition import Definition
@@ -10,7 +10,7 @@
 from .logic.lineage import SubpropertiesHandler, SuperpropertiesHandler
 from .pv import PropertyValue
 from .synonym import SynonymData
-from .utils.meta import typechecked
+from .utils.meta import typechecked, dataclass
 from .xref import Xref
 
 if typing.TYPE_CHECKING:

pronto/term.py

@@ -4,7 +4,7 @@
 import operator
 import typing
 import warnings
-from dataclasses import dataclass, field
+from dataclasses import field
 from typing import (
     Dict,
     FrozenSet,
@@ -25,7 +25,7 @@
 from .pv import PropertyValue
 from .relationship import Relationship
 from .synonym import SynonymData
-from .utils.meta import typechecked
+from .utils.meta import dataclass, typechecked
 from .utils.warnings import NotImplementedWarning
 from .xref import Xref
 

pronto/utils/meta.py

@@ -5,12 +5,20 @@
 import itertools
 import sys
 import typing
+from dataclasses import dataclass as _dataclass
 from typing import Callable, Iterator, List, Tuple, Type
 
 T = typing.TypeVar("T")
 F = typing.TypeVar("F", bound=Callable[..., object])
 
 
+def dataclass(init: bool = True, slots: bool = False, weakref_slot: bool = False):
+    if sys.version_info >= (3, 11):
+        return _dataclass(init=init, slots=slots, weakref_slot=weakref_slot)
+    else:
+        return _dataclass(init=init)
+
+
 class typechecked(object):
 
     _disable = 0